2009 Audi Trucks marked a period when Audi’s SUV lineup blended luxury, all-weather confidence, and increasingly sporty road manners. In that year, the Q5 and Q7 served different roles within the brand, with the Q5 positioned as a midsize crossover and the Q7 carrying more size and presence. Tire sizing varies across the 2009 Audi Trucks range, with seven distinct radial sizes spread across two models rather than one shared fitment, so the real choice begins with identifying the exact model and wheel diameter. Before choosing a tire, confirm whether you have a Q5 or Q7 and match the tire size to the wheel already on the vehicle.
Which Tire Size Is Right for Your 2009 Audi Trucks
Seven tire sizes are used across 2009 Audi Trucks vehicles, and they vary by model rather than being shared across the full range. Every size here is a radial, so the main decision is confirming the correct model and wheel diameter first, then matching the tire size already fitted to the vehicle. Understanding that distinction before choosing a product saves time and helps ensure the right match.
Year(s): 2009|Fit(s): Q5|Construction: Radial|Rim: 18-in rim
235/60R18 is a metric radial size with a 235-millimeter section width, a 60-series aspect ratio, and an 18-inch rim diameter. This Q5-specific size does not currently carry a product selection here, so the key point is confirming that your Q5 is on the 18-inch wheel package before moving deeper into size-specific research. It suits owners who need the factory size match for an 18-inch-wheel Q5 rather than a different wheel option used elsewhere in the 2009 Audi Trucks range.
Year(s): 2009|Fit(s): Q5|Construction: Radial|Rim: 19-in rim
235/55R19 is a metric radial size with a 235-millimeter section width, a 55-series aspect ratio, and a 19-inch rim diameter. This size is specific to certain Q5 wheel packages, so it is not interchangeable with the 18-inch or 20-inch Q5 fitments unless the wheels themselves match. It is the correct path for a 19-inch-wheel Q5 owner who wants to stay with the original size format used on that model.
Year(s): 2009|Fit(s): Q5|Construction: Radial|Rim: 20 in
255/45R20 is a metric radial size with a 255-millimeter section width, a 45-series aspect ratio, and a 20-inch rim diameter. This Q5-specific size is available from BFGoodrich, Nitto, and Pro-Trac in Blackwall and RWL sidewall styles, with W-rated products to 168 mph and rim-width coverage beginning at 8.0 inches and extending to 9.5 inches where specified. It is the right choice for Q5 owners running the 20-inch setup and comparing brand character, sidewall appearance, and wheel-width compatibility within the same size.
Year(s): 2009|Fit(s): Q7|Construction: Radial|Rim: 18-in rim
255/55R18 is a metric radial size with a 255-millimeter section width, a 55-series aspect ratio, and an 18-inch rim diameter. This size is specific to the Q7, so it belongs to that model’s 18-inch wheel fitment rather than the Q5’s smaller-width 18-inch tire. It is the correct starting point for a Q7 owner who needs the 18-inch factory size and wants to keep the vehicle matched to that wheel diameter.
Year(s): 2009|Fit(s): Q7|Construction: Radial|Rim: 19-in rim
265/50R19 is a metric radial size with a 265-millimeter section width, a 50-series aspect ratio, and a 19-inch rim diameter. This Q7-specific size sits between the 18-inch and larger-wheel Q7 fitments, so it should be chosen only when the vehicle is already equipped with the corresponding 19-inch wheels. It fits buyers who are narrowing the correct Q7 replacement size by wheel diameter before comparing individual tire options.
Year(s): 2009|Fit(s): Q7|Construction: Radial|Rim: 20-in rim
275/45R20 is a metric radial size with a 275-millimeter section width, a 45-series aspect ratio, and a 20-inch rim diameter. This size is specific to the Q7 and is distinct from the Q5’s 255/45R20 even though both mount on 20-inch wheels. It is the proper route for Q7 owners with the 20-inch package who need to match both the wheel diameter and the wider section width used on that model.
Year(s): 2009|Fit(s): Q7|Construction: Radial|Rim: 21-in rim
295/35R21 is a metric radial size with a 295-millimeter section width, a 35-series aspect ratio, and a 21-inch rim diameter. This is the largest and most model-specific fitment in the 2009 Audi Trucks range, reserved for Q7 applications using 21-inch wheels. It is the correct direction for owners confirming an upper-level Q7 wheel package where both diameter and width set it apart from every other size used that year.
Two models are covered for 2009 Audi Trucks. Tire size does not stay the same across the lineup, and each model uses its own group of sizes, so identifying whether you have a Q5 or Q7 is the first step before narrowing the correct fitment. Select a model below for model-specific fitment history and products.
2009 Audi Trucks Q5
The 2009 Audi Q5 arrived as Audi’s newer midsize luxury crossover, combining car-like road manners with SUV practicality and Quattro-era all-weather appeal. Its tires mount on 18-, 19-, or 20-inch rims depending on wheel package, so size selection follows the wheel currently on the vehicle rather than a one-size-fits-all Q5 fitment.
The 2009 Audi Q7 was Audi’s larger three-row SUV, with a broader, heavier-looking stance and wheel packages that could range from practical to distinctly performance-oriented in appearance. Its tires mount on 18-, 19-, 20-, or 21-inch rims depending on configuration, making wheel diameter the key detail to confirm before moving to a specific tire.
Four products are available across one tire size for 2009 Audi Trucks vehicles. The 255/45R20 Q5 fitment includes four radial choices from BFGoodrich, Nitto, and Pro-Trac with Blackwall and RWL sidewall styles, so confirm your size and wheel package before selecting.
These answers focus on how 2009 Audi Trucks tire sizes split between Q5 and Q7, what the metric radial size codes mean, which sidewall and brand choices exist in 255/45R20, and what to check on a modern collector-driven Audi before longer road use.
Size Basics & Fitment
What tire sizes fit 2009 Audi Trucks vehicles?
2009 Audi Trucks vehicles use seven distinct tire sizes across two models. The Q5 uses 235/60R18, 235/55R19, and 255/45R20, while the Q7 uses 255/55R18, 265/50R19, 275/45R20, and 295/35R21. All are radial sizes, but they do not share a common fitment across both models because section width and rim diameter vary by application.
That means year and make alone are not enough to choose a tire for 2009 Audi Trucks. Start by confirming whether you have a Q5 or Q7, then verify the wheel diameter already on the vehicle. Even where two sizes share the same rim diameter, such as the 20-inch Q5 and Q7 fitments, the overall tire size is still different and should be matched carefully to the exact model and wheel package.
What does 235/60R18 mean on a 2009 Audi Trucks tire?
On a 2009 Audi Trucks Q5, 235/60R18 means the tire is 235 millimeters wide, has a 60-series aspect ratio, uses radial construction, and fits an 18-inch wheel. That size belongs specifically to the Q5 rather than the Q7, even though both models were sold in the same year under the Audi Trucks banner.
The practical takeaway is that every part of the code matters. A different aspect ratio, width, or rim diameter changes the fitment, and moving from 18-inch to 19-inch or 20-inch wheels requires a different tire size entirely. If your Q5 still has its original wheel package, the tire size molded into the current sidewall is usually the quickest confirmation before you compare brands or tread styles.
Do all 2009 Audi Trucks models use the same tire size?
No, 2009 Audi Trucks models do not use the same tire size. The Q5 and Q7 each have their own fitment range, and every size used that year is model-specific rather than universal across the lineup. The Q5 covers 18-, 19-, and 20-inch fitments, while the Q7 spans 18-, 19-, 20-, and 21-inch fitments with different section widths.
That difference matters because an Audi owner can easily assume that the same-year crossover and SUV line share tires when they actually do not. The safest approach is to identify the model first and confirm the wheel diameter second. Once those two details match, you can narrow the correct size quickly and avoid comparing products that belong to the other model’s wheel and tire package.
Buying the Right Tire
What sidewall styles are available for 2009 Audi Trucks tires?
For 2009 Audi Trucks, the sidewall style variety currently centers on the 255/45R20 Q5 fitment. That size is available in Blackwall and RWL form, depending on the product. Blackwall keeps a modern OEM-style appearance, while RWL adds a more aggressive period-performance look that some owners prefer on custom or sport-oriented builds.
Choosing between them comes down to appearance more than basic fitment, because both are built in the same 255/45R20 radial size. If your Q5 is kept close to factory visual character, Blackwall is usually the more understated direction. If the vehicle wears aftermarket wheels or a more expressive street presentation, an RWL tire can change the look without changing the size itself.
What brands make tires for 2009 Audi Trucks vehicles?
The 255/45R20 fitment used on certain 2009 Audi Trucks Q5 models is available from BFGoodrich, Nitto, and Pro-Trac. BFGoodrich appears in more than one product line within that size, while Nitto and Pro-Trac offer additional alternatives with their own tread and sidewall presentation. All of those products are radial tires built around the same basic Q5 20-inch fitment.
Brand choice is most useful after the size is confirmed. A Q5 owner on 20-inch wheels can compare those brands within one fitment, but a Q7 owner will need to start with the correct Q7 size first. Once you are inside the right size, the decision usually shifts toward the visual style you want, the tire family you prefer, and any rim-width or load details tied to that specific product.
What is the difference between BFGoodrich and Pro-Trac tires for the 2009 Audi Trucks 255/45R20 size?
Within the 255/45R20 size used on some 2009 Audi Trucks Q5 models, BFGoodrich and Pro-Trac differ most clearly in sidewall presentation and the way the product line is positioned. BFGoodrich options in this size use a Blackwall sidewall, while the Pro-Trac Street Pro III is available as an RWL tire. BFGoodrich products here also show an 8.0- to 9.5-inch rim-width range, and one carries a 101W service description with a 1,819-pound load rating at 51 psi.
That makes the comparison less about basic fitment and more about how you want the tire to look and how closely you want to match the wheel-width guidance shown within the size. A Q5 owner keeping a cleaner late-model appearance may lean toward Blackwall, while someone after a more assertive visual style may prefer RWL. Either way, stay inside 255/45R20 and confirm the wheel width before making the final call.
Fitting & Setup
What rim width do 2009 Audi Trucks tires require?
Rim-width guidance is currently available for the 255/45R20 size used on some 2009 Audi Trucks Q5 models. In that size, BFGoodrich products specify an 8.0- to 9.5-inch rim-width range. The other 2009 Audi Trucks sizes on this page do not currently carry the same wheel-width detail here, so the best practice is to match the tire to the wheel already fitted to the vehicle and confirm width on the specific tire page before final selection.
Rim width matters because a tire can share the correct diameter yet still be a poor match for the wheel if the wheel is too narrow or too wide. That affects sidewall shape and can alter how the tire sits and responds. On a 2009 Audi Trucks application, always confirm both the rim diameter and the approved width range for the exact tire you are considering.
Do 2009 Audi Trucks tires require inner tubes?
The 2009 Audi Trucks products shown in 255/45R20 do not carry tube-type markings, and they are modern radial passenger-vehicle tires intended for tubeless use on the correct wheels. That fits the era and design of the Q5, which was built around contemporary wheel and tire technology rather than vintage tube-type construction.
Even so, tube use should never be assumed from era alone when wheels have been changed or restored. If your 2009 Audi Trucks vehicle is running original-style modern tubeless wheels, the tire and wheel should be matched as a tubeless system. If the wheel history is unclear or the vehicle has custom wheels, inspect the wheel condition and valve setup closely before the new tire is mounted.
Maintenance, Storage & Longevity
How should I store a 2009 Audi Trucks when the tires are fitted?
A 2009 Audi Trucks vehicle should be stored in a cool, dry space away from direct sunlight, electric motors, battery chargers, welders, and other ozone-producing equipment that can age rubber prematurely. Keep the tires clean, maintain proper inflation, and move the vehicle periodically so one spot on the tread is not carrying the load for months at a time. Radials tolerate storage better than older bias-ply designs, but they still age from environment and time.
If the vehicle will sit for a long season, many collectors roll it a short distance occasionally or support it in a way that reduces long-term stress on one contact patch. That is especially useful on heavier luxury SUVs such as the Q7. Good storage habits protect sidewalls, reduce flat-spotting, and help preserve ride quality when the vehicle returns to regular use.
How long do tires on a 2009 Audi Trucks typically last?
On a 2009 Audi Trucks vehicle, age matters more than mileage once the vehicle becomes a low-use collector or occasional-driver SUV. A sound rule is to begin evaluating tires closely once they reach five to seven years of age and to treat about ten years as the point where replacement deserves serious consideration regardless of tread depth. The DOT date code on the sidewall is the best guide to the tire’s actual age.
That approach is especially important on vehicles that may look fine visually but spend long periods parked. Rubber hardens, internal materials age, and the tire can lose confidence-inspiring behavior long before the tread is worn out. If a 2009 Audi Trucks vehicle still wears older tires with plenty of tread, age alone may be reason enough to replace them before regular highway driving resumes.
How often should tires on a 2009 Audi Trucks be inspected?
Tires on a 2009 Audi Trucks vehicle should be inspected before every drive and again before any longer trip. Check inflation pressure, tread depth, shoulder wear, cuts, bulges, punctures, and sidewall cracking, and make sure the valve stems are in good condition. On larger-wheel applications such as 20- and 21-inch fitments, curb damage and inner-sidewall condition also deserve close attention.
That quick inspection becomes even more important if the vehicle is driven infrequently, because issues often develop while parked rather than while accumulating miles. A five-minute walkaround can catch a low tire, weather checking, or an impact-related bulge before it becomes a roadside problem. Include the spare in that routine so it is ready if a longer outing does not go as planned.
Safety & Road Use
Are 2009 Audi Trucks tires safe for highway driving?
Yes, 2009 Audi Trucks tires can be safe for highway driving when the correct size, load capability, condition, and inflation are all in order. The 255/45R20 products shown for the Q5 include W-rated tires, which carry a 168 mph speed ceiling. That is well beyond normal U.S. highway use, so real-world safety usually depends more on tire age, condition, inflation, alignment, and the vehicle’s overall mechanical state than on outright speed rating alone.
A well-maintained Q5 or Q7 on fresh, properly matched tires should have no trouble with normal highway travel. The more important question is whether the tires are the correct size for the wheel and whether they are still healthy enough for sustained use. Before a road trip, inspect all four tires carefully and make sure the spare is serviceable as well.
What inflation pressure should I use for 2009 Audi Trucks tires?
Inflation pressure on 2009 Audi Trucks tires should follow the vehicle placard or owner’s manual first, because Audi set those pressures around the vehicle’s weight distribution and intended use. Within the available 255/45R20 product group for the Q5, one BFGoodrich tire shows a maximum load of 1,819 pounds at 51 psi. That figure is the tire’s maximum-rated pressure context, not a blanket running pressure for every 2009 Audi Trucks size.
Use the factory vehicle recommendation as your baseline and compare it against the tire maker’s guidance for the exact product you choose. Do not transfer a pressure figure from 255/45R20 to the Q7’s other sizes, or even to another 255/45R20 product, without checking the tire itself. Correct inflation supports handling, wear, ride quality, and heat control on both Q5 and Q7 applications.
What should I check before taking a 2009 Audi Trucks on a longer drive?
Before a longer drive in a 2009 Audi Trucks vehicle, inspect each tire for cracking, punctures, impact bulges, irregular wear, and proper inflation. Confirm that the size matches the wheel package on the vehicle, check the valve stems, and make sure the spare tire is usable. On larger-diameter SUV fitments, also look closely at the inner sidewall and wheel lip, since damage there is easy to miss in casual inspection.
Tires are only one part of the pre-trip routine on a 2009 Audi Trucks model, but they are the part that meets the road. It is wise to pair the tire check with a broader review of brakes, fluids, suspension, and battery condition, especially if the vehicle sees seasonal or occasional use. Catching a weak tire at home is far better than discovering it hours into the trip.
